In this paper we discuss the role of explicit specifications of domain conceptualisations -now popularly called "ontologies" -in legal information systems. We describe the advantages that accrue from producing an ontology for such systems, as well as the ontologies so far developed which are directed at the legal domain. We then illustrate how taking an ontological perspective can give insight into what is common and what is disparate in apparently different approaches. We conclude by offering some findings as to the nature of ontologies for legal information systems, and some ideas concerning the creation of a library of legal ontologies.

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This paper evaluates and extends the novel method of preparing tissue blocks for paraffin sections within 30 to 60 min, that was proposed in early 1985 in a paper by Boon et al. (1986). More than 2 years' additional experience and testing various microwave ovens has led to new protocols reported in this paper. Results are given of testing (i) an especially designed microwave oven for histoprocessing, (ii) microwavable reagents, (iii) processing larger numbers of specimens simultaneously, (iv) handling different types and sizes of tissue. It is concluded that effective temperature control offers substantial advantages. In addition, the possibilities of performing routine diagnostic pathology omitting formalin altogether are sketched.